As you browse through the CSS Properties section of the CSS Reference, you'll find that there is more than one way to get a job done. We've already covered #ff0000 vs red. You'll find the same thing when dealing with other measures as well. (This is what happens when a bunch of computer people get together to simplify something... you get an even BIGGER mess.)

The best way to learn about various properties is to experiment with them. One handy property that can be applied to a paragraph tag is padding...

<html>
<head>
<title></title>
<style type="text/css">
p.josh { padding-left:10px; }
p.jeff { padding-left:20px; padding-top:30px; }
</style>
</head>
<body>
<p>This paragraph is normal.</p>
<p class="josh">This paragraph is padded on the left by about 10 pixels.</p>
<p class="jeff">This paragraph is padded on the left by about 20 pixels,
and on the top by an extra 30 pixels.</p>
<p>This paragraph is back to normal.</p>
</body>
</html>